Description
Bug summary
I use matplotlib + PyQt5. The figure is placed inside a QSplitter (a standard Qt widget that consists of several vertical or horizontal parts which the handles between those parts can resize). When a part of QSplitter shrinks to a zero size it automatically resizes the widget it contains. I already had an issue with this (#17093) but now I have a new one.
When there are other widgets in the same splitter part with a figure the figure becomes negatively sized.
Here a splitter consists of two parts: the top one with one button and the bottom one with a figure and a button in a vertical layout. When I pull the split line all the way down I get an exception that the figure has a negative size.
Code for reproduction
import sys
from PyQt5.QtWidgets import QMainWindow, QApplication, QVBoxLayout
from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvas
from matplotlib.figure import Figure
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(800, 600)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.gridLayout = QtWidgets.QGridLayout(self.centralwidget)
self.gridLayout.setObjectName("gridLayout")
self.splitter = QtWidgets.QSplitter(self.centralwidget)
self.splitter.setOrientation(QtCore.Qt.Vertical)
self.splitter.setObjectName("splitter")
self.pushButton = QtWidgets.QPushButton(self.splitter)
self.pushButton.setObjectName("pushButton")
self.widget = QtWidgets.QWidget(self.splitter)
self.widget.setObjectName("widget")
self.verticalLayout = QtWidgets.QVBoxLayout(self.widget)
self.verticalLayout.setContentsMargins(0, 0, 0, 0)
self.verticalLayout.setObjectName("verticalLayout")
self.plot = QtWidgets.QWidget(self.widget)
self.plot.setObjectName("plot")
self.verticalLayout.addWidget(self.plot)
self.pushButton_2 = QtWidgets.QPushButton(self.widget)
self.pushButton_2.setObjectName("pushButton_2")
self.verticalLayout.addWidget(self.pushButton_2)
self.gridLayout.addWidget(self.splitter, 0, 0, 1, 1)
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 32))
self.menubar.setObjectName("menubar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.pushButton.setText(_translate("MainWindow", "PUSH"))
self.pushButton_2.setText(_translate("MainWindow", "PUSH2"))
class MainWindow(QMainWindow):
def __init__(self, *args):
super().__init__(*args)
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
self.figure = Figure()
self.canvas = FigureCanvas(self.figure)
layout = QVBoxLayout()
layout.addWidget(self.canvas)
self.ui.plot.setLayout(layout)
app = QApplication(sys.argv)
mw = MainWindow()
mw.show()
app.exec()Actual outcome
ValueError: figure size must be positive finite not [ 7.76 -0.06]
Expected outcome
Not seeing an exception.
Additional information
No response
Operating system
Kubuntu 22.04
Matplotlib Version
3.7.1
Matplotlib Backend
QtAgg
Python version
Python 3.10.6
Jupyter version
No response
Installation
pip